Combination square, protractor, and level.



J. E. NORDLIE.

COMBINATION SQUARE, PROTRAGTOR, AND LEVEL.

APPLICATION FILED JULY 20. 1913.

1 1 1 8,907, Patented Nov. 24. 1914.

J. B. NORDLIE.

COMBINATION SQUARE, PROTRAOTOR, AND LEVEL.

APPLICATION FILED JULY 2a, 191:.

1 1 1 8,907, Patented Nov. 24 1914.

2 SHEETS-SHEET 2.

THE NORRIS PETERS CO. PHOTO LI VHO WAbHHlUION D c STATES PAENT. @FFICE.

JOHN E. NORDLIE, 0F SIOUX FALLS, SOUTH DAKOTA, ASSIG-NOR OF ONEJ IAIJF TO VIOLA A. NORDLIE, OF SIOUX FALLS, SOUTH DAKOTA.

COMBINATION. SQUARE, PROTRACTOR, AND LEVEL.

Specification of Letters Patent.

Patented Nov. 24, 1914..

Application filed July 28, 1913. Serial No. 781,676. l

To all whom it may concern:

Be it known that I, JOHN E. N ORDLIE, a citizen of the United States, residing at Sioux Falls in the county of Minnehaha and State of South Dakota, haveinvcnted certain new and useful Improvements in Combination Squares, Protractors, and Levels; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it' appertains to make and use the same.

This invention relates to improvements in combined squares, bevel protractors and levels.

One object of the invention is to provide a tool of this character having an improved means for holding the parts in position when adjusted for obtaining all standard angles and independent means for holding the parts whenadjusted for obtaining all intermediate angles.

Another object is to provide a combination square, and protractor which will be simple, strong, durable and inexpensive in construction, efficient and reliable in opera tion and well adapted to the purpose for which it is designed.

lVith these and other objects in view, the invention consists of certain novel features of construction, and the combination and arrangement of parts as will be more fully described and claimed.

In the accompanying drawings: Figure 1 is a sideview of the tool with the parts arranged to form a tri-square; Fig. 2 is a similar view with the parts arranged to form a bevel square; Fig. 3is a similar View with the parts arranged to form a level; Fig. 4: is a vertical cross section taken on the line H of Fig. 1; Fig. 5 is a vertical longitudinal section taken on the line 5-5 of Fig. 4; Fig. 6 is a detail perspective view of the inner blade attaching member of the device; Fig. 7 is a detail vertical sectional View similar to Fig. 5 with the parts in the position shown in Fig. 2 wherein the head is fastened at an intermediate angle by the tubular clamping screw of the device.

My improved square and protractor comprises ablade 1 which may have arranged thereon any desired scales of graduation and in oneside of which is formed a longitudinal groove or channel 2 which extends throughout the entire length of the blade and is preferably disposed midway between the side edges thereof as shown. Silidably mounted on the blade 1 is the body or head 3 of the square, said body or head having two working faces 1 and 5 which form an acute :igle to each other and are connected at one end by a web 6 having a thickness equal to the width of the faces 1 and 5 and which is provided with a circular opening 7. One side of the web is cut transversely to form a curved or segmental gripping arm 8 the purpose of which will be hereinafter described. The portion of the body or head 3 between the working :faces 1 and 5 beyond web (5 is in the form of a web 9 the thickness of which is considerably less than the widthof said faces and said web 9 has arranged therein adjacent to and parallel with the working face i a spirit level 10 the view opening of which is protected by a curved guard 11 as shown. The inner edge of theweb 9 is formed on an arc corresponding to the curvature of the cut inner ping arm 8.. i

In the recessed or cut away portion of the web 9 adjacent to the inner or free end of the gripping arm 8 is formed a threaded aperture 12 with which is operatively engaged a tubular clamping screw 13 the inner end of which is designed to bear against the outer side. of the gripping arm 8 for a purpose hereinafter described. In the gripping arm 8 at the point where thcinner end of the clamping screw. 13 engages the same is formed an aperture 14 which is of less diameter than the screw 18 and is designed to receive a set screw 15 which has a threaded engagement with the tubular clamping screw 13 and which is provided for a pur pose which will be hereinafterdescribed. The inner portion of the body or head 3 has therein a longitudinally disposed passage 16 which intersects the opening 7 inthe web 6 and which communicates with a groove or channel 17 formed in the face 1 andadjacent portion of theweb 9 as shown. The. passage 16 and the groove 17 are designed to receive the blade 1 when the body or head 3 of the square is applied thereto.

Arranged in the opening 7 of the head is a circular bearing frame. 18 in the outer portion of which is formed a web 19 having thercthrough a centrally disposed passage 20. Formed in the outer portion of the portion of the web 6 which forms the gripframe 18 and in the web 19 is a longitudinally disposed slot 21 which intersects the passage 20 and which registers with the passage 16 in the inner portion of the head The slot 21 is designed to receive the blade of the square when the blade is engaged with the passage 16 and when the blade is engaged with the slot 21 the bearing frame 18 is rigidly secured to the blade by a clamping mechanism comprising a screw 22 the upper or inner end of which is threaded for a suitable distance while the outer portion thereof which enters the passage '20 in the frame 18 is cut away to less than half the thickness of the screw so that the flat surface of the screw will be flush with the adjacent wall of the slot 21 in the frame 18 and web 19. On the outer end of the cut away portion of the screw is formed a lat terally extending blade gripping lug 23 which is designed to fit and slide in the groove or channel 2 of the blade when the head is applied thereto. On the screw 22 adjacent to the inner end of the threaded portion thereof are formed laterally projecting guide studs 2% which work in the passage 20 and hold the screw 22 against turning in said passage 20. The studs 24: are also designed to enter the upper end of theslot 21 in the web 19 on opposite sides of the passage 20 and to thus limit theinward movement of the screw.

Engaged with the threaded end of the screw 22 is a blade clamping nut 25 having in its inner end a recess 26 in which is disposed a coiled spring 27 the pressure of which is applied to retract the bolt 22 and to hold the frame in yielding engagement with the blade when the nut 25 is released to permit the frame to be adjusted to the desiredposition on the blade.

On opposite faces of one portion of the frame 18 are formed radially disposed in dicating marks 28 with which are adapted to co-act with indicating marks 29 arranged on the opposite sides of the inner end of the head or body 3. The marks 28 on the frame 18 are arranged at suitable distances apart for indicating the standard angles of measurement when the body or head 8 is turned to bring the indicating mark 29 thereon into register with the marks 28. In the outer surface or periphery of the frame 18 are formed a series of indentations 30 which are disposed'in registry with the graduations or indicating marks 28 on the frame 18 and which are designed to receive the inner end of the set screw 15 when the latter is screwed inwardly through the tubular clamping screw 13 and through the aperture 14: in the gripping arm 8 said set screw thus rigidly holding the head or body 3 at any of the standard angles. When it is desired to adjust the head or body 3 to any angle between the standard angles the set screw 15 is unscrewed until the end thereof is disconnected from the indentations 30 after which the head 3 is turned on the bearing frame to the desired angle or position in which position said head may be secured by the clamping screw 13 which is screwed inwardly into engagement with the gripping arm 8 thus forcing the latter into tight frictional engagement with the frame or if desired the set screw 15 may also be screwed into engagement with the frame 18 at intermediate points between the indentations 30 and the head thus secured in its adjusted positions. The aperture 1a in the gripping arm 8 is preferably arranged diagonally opposite to or in alinement with the indicating marks 29 on the opposite sides of the corner of the head so that when the working face s of the head is disposed at right angles to the blade 1 as shown in Fig. 1 the indicating marks 29 of the head and the aperture 14-, in alinement with said marks will be at an angle of 15 to the blade 1 thus permitting the set screw 1.5 to enter one of the indentations 30 of the frame 8 and rigidly hold the head in this position.

When it is desired to adjust the head longitudinally on the blade 1 of the square the nut is unscrewed from the bolt 22 to a sufficient extent for releasing the bolt. When the bolt is thus released the action of the spring 27 will yieldingly retract the bolt and thus lightly or yieldingly grip the blade between the lug 23 on the outer wall of the bolt and the inner ends of the groove 2 which will permit the head to be freely slipped along to the desired position on the blade. After the head has thus been adjusted the nut 25 is again tightened up thus forcibly retracting the bolt and tightly gripping the blade between the lug 23 of the bolt and the inner ends of the slot 21 as will be readily understood.

From the foregoing description taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood Without requiring a more extended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of the invention as claimed.

Having thus particularly described the nature of my invention what I claim is 2- 1. In a combination tool of the class described, a blade, a circular bearing frame slidably mounted thereon, a head pivotally mounted on said frame and having a gripping arm provided with an aperture, means to fasten said frame in its adjusted positions on the blade, a clamping screw having a threaded engagement with said head and adapted to be screwed into engagement with said gripping arm, and a set screw adapted to be projected through the aperture in said gripping arm and to engage said frame to hold said head at standard angles to the blade.

2. In a combination tool, a blade, a circib lar bearing frame slidably mounted thereon and having in its periphery a series of indentations, a head pivotally mounted on said frame, means to fasten said frame in its adjusted positions on the blade, a segmental gripping arm carried by said head and operatively engaged with said frame, said arm having an aperture therein adapted to register with any one of the indentations in said frame, a clamping screw car ried by said head and adapted to be screwed into engagement with said gripping arm, and a set screw adapted to be projected through the aperture in said gripping arm and to engage said frame or the indentations therein.

3. In a combination tool of the character described, a blade, a circular bearing frame slidably mounted thereon, a head pivotally mounted on said frame and having a segmental gripping arm provided with an aperture, means to fasten said frame in its adjusted positions on the blade, a tubular clamping screw having a threaded engagement with said head and adapted to be screwed into engagement with said segmental gripping arm, whereby the latter is clamped into tight frictional engagement with said circular frame thereby holding said head in any of its adjusted positions on the frame, and a set screw having a threaded engagement with said tubular clamping screw and adapted to be projected through the aperture in said segmental gripping arm and into engagement with said frame to hold said head at standard angles to the blade.

4:. In a combination tool of the character described, a blade, a circular bearing frame slidably mounted thereon and having in its,

periphery series of indentations arranged at standard angles with respect to the blade, a head pivotally mounted on said frame,

means to fasten said frame in its adjusted positions on the blade, a segmental resilient gripping arm carried by said head and havmg an operative engagement with said frame, said arm having therein an aperture adapted to be brought into register with the indentations in said frame, a tubular interiorly and exteriorly threaded clamping screw carried by said frame and adapted to be screwed into engagement with said segmental gripping arm, whereby the latter is clamped against said frame and said head thereby fastened in its adjusted positions and at any angle with respect to the blade, and a set screw having an operative engage ment with the internal threads of said tubular clamping screw and adapted to be projected through the aperture in said gripping arm and into engagement with said frame or with the indentations therein, whereby said head is fastened when adjusted to standard angles with respect to the blade.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

S. L. STUBBs, V. A. S'roors.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

